Tongue folding assembly, box sealing device, packing machine and computer readable medium

ABSTRACT

The application provides a tongue folding assembly, a box sealing device, a packaging machine and a computer-readable medium for bending a main cover of a packaging box to form a insertion tongue, including a first base plate with a first inclined surface, a second base plate capable of bending the main cover to a first preset position in the direction of the first inclined surface, and a pressing piece capable of pressing the main cover onto the first inclined surface. When the folding tongue assembly is used to bend the insertion tongue, the bending degree of the insertion tongue can be controlled, and the bending degree can be adjusted.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation application of international application No. PCT/CN2020/076303, filed on Feb. 22, 2020, which claims the priority benefits of Chinese applications No. 201910132859.0, No. 201920232450.1, No. 201920229670.9, No. 201910132718.9, No. 201920234077.3 field on Feb. 22, 2019, and Chinese applications No. 201920556707.9 field on Apr. 22, 2019, the contents of the above identified applications are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

The present application belongs to the technical field of packing machines, and particularly relates to a tongue folding assembly, a box sealing device, a packing machine and a computer readable medium.

BACKGROUND ART

Generally, there are two opposite main covers at ends of a packing box. In order to make the packing box more stable, the main covers are usually each provided to include a portion for covering a box opening and a portion to be bent into an insertion tongue, and when the packing box is sealed, it is required that the main covers are bent to form the insertion tongues which are then inserted into the packing box. When the packing box is sealed, especially in a link where the main covers are bent to form the insertion tongues, it needs manual operation, since it is difficult for the machine to stably achieve tongue folding and tongue inserting, the production efficiency of manual operation is low, the production quality cannot be guaranteed and the production cost is high.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a tongue folding assembly, used for bending main covers of a packing box to form insertion tongues, comprising a first base plate having a first inclined surface, a second base plate capable of bending the main cover towards the first inclined surface to a first preset position, and a pressing piece capable of pressing the main cover onto the first inclined surface.

Preferably, the first base plate further comprises a first clamping surface, and the second base plate comprises a second clamping surface provided corresponding to the first clamping surface, and at least one first protrusion protruding towards the first base plate, to bend the main cover to the first preset position.

Preferably, the pressing piece comprises an accommodating portion provided corresponding to the first protrusion, to engage with the first protrusion.

Preferably, the first protrusion comprises a first end surface adjacent to the first base plate, and the accommodating portion comprises a first matching surface provided corresponding to the first end surface.

Preferably, the first inclined surface is provided on one side of the first base plate away from the second base plate, and the pressing piece comprises a second inclined surface provided corresponding to the first inclined surface.

Preferably, the first base plate further comprises arc-shaped first guide surfaces protruding towards the second base plate, and the second base plate further comprises arc-shaped second guide surfaces protruding towards the first base plate.

The present application also provides a box sealing device comprising the tongue folding assembly described above, further comprises a tongue inserting assembly for inserting insertion tongues into the packing box.

Preferably, the tongue inserting assembly comprises a knocking piece, a fourth protrusion protruding from the knocking piece to limit displacement of the insertion tongue, and a third driving member for driving the knocking piece to rotate.

Preferably, the box sealing device comprises a limiting assembly provided on one side of the first base plate of the tongue folding assembly away from the pressing piece, the limiting assembly comprises a limiting piece, and a fourth driving member connected with the limiting piece to drive the limiting piece to move in a direction away from or close to the tongue inserting assembly.

Preferably, the box sealing device comprises a fifth driving member connected with the tongue folding assembly for driving the tongue folding assembly away from and close to the packing box.

The present application also provides a packing machine comprising the box sealing device described above.

The present application also provides a computer readable medium, capable of connecting with the tongue folding assembly described above, having stored therein preset program that, when executed, causes to carry out the following steps: clamping, by a first base plate and a second base plate, to bend a main cover to a first preset position in a direction close to a first inclined surface, and pressing, by a pressing piece, the main cover onto a first inclined surface to form a insertion tongue.

Compared with the prior art, the present application has the following beneficial effects: with the arrangement of a first base plate and a second base plate, a main cover is initially bent to a first preset position, and then is pressed onto a first inclined plane via a pressing piece to form an insertion tongue, so that by means of the above-mentioned two-step forming, the bending degree of the insertion tongue is controllable, the bending degree can be effectively adjusted by adjusting the first inclined plane, and with respect to boxes of different types and different materials, the insertion tongue can be effectively adjusted by adjusting the bending angle of the first inclined plane; and at the same time, the damage to the main cover during one-step bending can be effectively avoided, and the situation that the insertion tongue is too large or too small due to an inaccurate bending position during one-step forming can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a packing box according to an embodiment;

FIG. 2 is a first schematic structural diagram of a tongue folding assembly according to an embodiment of the present application;

FIG. 3 is a second schematic structural diagram of a tongue folding assembly according to an embodiment of the present application;

FIG. 4 is a third schematic structural diagram of a tongue folding assembly according to an embodiment of the present application;

FIG. 5 is a partially enlarged view of a portion A in FIG. 3;

FIG. 6 is a partially enlarged view of a portion B in FIG. 4;

FIG. 7 is a schematic structural diagram of a sealing device according to the first embodiment of the present application;

FIG. 8 is a schematic structural diagram of a sealing device according to the second embodiment of the present application;

FIG. 9 is a schematic structural diagram of a sealing device according to the third embodiment of the present application;

FIG. 10 is a partial enlarged view of a portion C in FIG. 9;

FIG. 11 is a first schematic structural diagram of a sealing device according to the fourth embodiment of the present application;

FIG. 12 is a second schematic structural diagram of a sealing device according to the fourth embodiment of the present application;

FIG. 13 is a partial enlarged view of a portion D in FIG. 12;

in which: 101 packing box, 1011 side cover, 1012 main cover, 1013 side plate, 1014 main plate, 1015 box opening, 1016 insertion tongue, 1 tongue folding assembly, 11 first base plate, 111 first inclined surface, 112 first clamping surface, 113 first guide surface, 12 second base plate, 121 second clamping surface, 122 first protrusion, 1221 first end surface, 123 first groove, 124 third protrusion, 125 second guide surface, 13 pressing piece, 131 accommodating portion, 1311 first matching surface, 132 second protrusion, 133 second inclined surface, 134 connecting surface, 135 slotted hole, 14 first driving member, 15 second driving member, 2 box sealing device, 21 tongue inserting assembly, 211 knocking piece, 2111 fourth protrusion, 212 third driving member, 22 limiting assembly, 221 limiting piece, 222 fourth driving member, 23 fifth driving member, 24 sixth driving member, 25 seventh driving member, 26 cover folding assembly, 261 mounting bracket, 262 rotating rod, 263 eighth driving member, 264 protruding piece, 27 main frame.

DETAILED DESCRIPTION OF THE INVENTION

The following is a detailed description for the technical solutions of the present application in combination with specific implementations. However, it should be understood that, without further recitation, elements, structures and features in one implementation may be beneficially incorporated into other implementations.

In the description of the present application, it is to be understood that terms “first”, “second” are merely used for descriptive purpose and should not be interpreted to indicate or imply the relative importance or implicitly indicate the number of technical features indicated. Thus, the features defined by “first” and “second” may explicitly or implicitly include one or more of the features.

In the description of the present application, it is to be noted that the direction or positional relationships indicated by terms “upper”, “lower”, “bottom”, “inner” and the like are based on the positional relationships in FIG. 2, these terms are merely used to facilitate the description of the present application and simplify the description, yet do not indicate or imply that the devices or elements referred must have a particular orientation, be constructed and operated in particular orientation, and therefore should not be interpreted as a limitation on this application.

In the description of the present application, it is to be noted that, unless clearly indicates otherwise, terms “connect”, “connection” shall be generally understood, such as, may be fixed connection, detachable connection or integrated connection, may be directly connected, or indirectly connected through intermediate media, or inner communication of two components. For the person skilled in the art, the specific meanings of the above terms in the present application may be interpreted according to specific circumstance.

The implementations are only description for the preferred embodiments of the present application, not a limitation on the scope of the present application, without departing from the design spirit of the present application, all kinds of transformation and modification made by the person skilled in the art to the technical solution of the present application should fall within the protection scope defined by claims of the present application.

FIG. 1 shows a packing box 101, wherein two opposite side covers 1011 and two main covers 1012 located between the side covers 1011 are provided at ends of the packing box 101; the side covers 1011 of the packing box are connected with two opposite side plates 1013; the main covers 1012 of the packing box are connected with two opposite main plates 1014; and a box opening 1015 of the packing box after being unfolded is generally rectangular. The main covers 1012 are each provided to include a portion for covering the box opening 1015 and a portion for being bent into an insertion tongue; when the packing box 101 is sealed, the main covers 1012 are necessarily bent to form the insertion tongues which are then inserted into the packing box.

With reference to FIGS. 2-4, a first embodiment of the present application provides a tongue folding assembly 1 for bending main covers 1012 of a packing box to form insertion tongues 1016. The tongue folding assembly 1 comprises a first base plate 11 having a first inclined surface 111, a second base plate 12 capable of bending the main cover 1012 towards the first inclined surface 111 to a first preset position, and a pressing piece 13 capable of pressing the main cover 1012 onto the first inclined surface 111, wherein the first base plate 11 and the second base plate 12 are oppositely provided, the pressing piece 13 is provided on the same side of the first base plate 11 and the second base plate 12, and the pressing piece 13 can press the main cover 1012 at the first preset position onto the first inclined surface 111. It is noted that in the present embodiment the tongue folding assembly 1 is located above the packing box 101 and used for bending the main covers 1012 at the upper part of the packing box 101 to form the insertion tongues 1016. When bending the insertion tongues 1016 at the lower part of the packing box 101, it is necessary to rotate the main covers 1012 at the lower part of the packing box by 180 degrees or rotate the tongue folding assembly 1 by 180 degrees so that the main covers 1012 are opposite to the tongue folding assembly 1.

According to the tongue folding assembly 1 provided in the present embodiment, through the arrangement of the first base plate 11 and the second base plate 12, the main cover 1012 located between the first base plate 11 and the second base plate 12 is initially bent to the first preset position, i.e. the main cover 1012 is pre-bent, then the main cover 1012 at the first preset position is pressed onto the first inclined surface 111 via the pressing piece 13, so that the pre-bent main cover 1012 continues to be bent, thereby forming the insertion tongue 1016. Through the above-mentioned two-step forming, the bending degree of the insertion tongue 1016 can be controlled, and can be effectively adjusted by adjusting the inclination degree of the first inclined surface 111; with respect to packing boxes 101 of different types and different materials, the bending degree can be effectively adjusted by adjusting the inclination angle of the first inclined surface 111; at the same time, by means of the two-step forming, the damage to the main cover 1012 during one-step bending is effectively avoided, and it is possible to prevent the insertion tongue 1016 from being too large or too small due to an inaccurate bending position during one-step forming.

In order to position the main cover 1012 between the first base plate 11 and the second base plate 12 for pre-bending, specifically, as shown in FIGS. 2 and 3, the first base plate 11 further comprises a first clamping surface 112, and the second base plate 12 comprises a second clamping surface 121 provided corresponding to the first clamping surface 112, and at least one first protrusion 122 protruding towards the first base plate 11, to bend the main cover 1012 to the first preset position. When the first clamping surface 112 and the second clamping surface 121 clamp, the first protrusion 122 is located above the first clamping surface 112, that is, the first protrusion 122 is located above the first base plate 11, and this arrangement does not hinder the clamping of the first clamping surface 112 and the second clamping surface 121. When the first base plate 11 and the second base plate 12 clamp, a portion of the main cover 1012 is clamped between the first clamping surface 112 and the second clamping surface 121, the other portion of the main cover 1012 is located above the first base plate 11 and is in contact with the first protrusion 122, the first protrusion 122 bends the main cover 1012 located above the first base plate 11 towards the first base plate 11 to the first preset position, at this time, the main cover 1012 dose not abut against the first inclined surface 111, but approaches towards the first inclined surface 111 by being pushed by the first protrusion 122. The first protrusion 122 is located above the first base plate 11, and thus the first preset position is above the first base plate 11. In practical applications, the first preset position can be adjusted by changing the position of the first protrusion 122 relative to the first inclined surface 111 and the protruding height of the first protrusion 122 according to the parameters such as the material of the main cover 1012 or the size of the packing box 101. The above way can effectively prevent a situation that damage is caused to the main cover 1012 when bending directly.

In order to facilitate the pressing piece 13 to press the pre-bent main cover 1012, as shown in FIG. 2, the pressing piece 13 comprises an accommodating portion 131 provided corresponding to the first protrusion 122, to engage with the first protrusion 122. When the number of the first protrusions 122 is plural, the accommodating portion 131 may be provided as one accommodating portion 131 to receive the plurality of first protrusions 122, or may be provided as a plurality of accommodating portions to correspond to the plurality of accommodating portions 131 one by one. The accommodating portion 131 cooperates with the first protrusion 122, and the pressing piece 13 can press the pre-bent main cover 1012 to the first inclined surface 111 without hindrance when the first base plate 11 and the second base plate 12 clamps with each other. Specifically, the first protrusion 122 comprises a first end surface 1221 adjacent to the first base plate 11, and the accommodating portion 131 comprises a first matching surface 1311 provided corresponding to the first end surface 1221. When the first base plate 11 and the second base plate 12 clamp, the first end surface 1221 abuts against the first matching surface 1311, so that it can be ensured that no misalignment occurs when the first base plate 11 and the second base plate 12 clamp, and that the operation of the pressing piece 13 is prevented from being affected.

In order to make the insertion tongue 1016 bent by the pressing piece 13 more flat, as a preferred embodiment, as shown in FIG. 2, the first inclined surface 111 is provided on one side of the first base plate 11 away from the second base plate 12, and the pressing piece 13 comprises a second inclined surface 133 provided corresponding to the first inclined surface 111. The second inclined surface 133 is located on the pressing piece 13 and is on one side close to the first base plate 11. After the first base plate 11 and the second base plate 12 clamp, the main cover 1012 is pre-bent to the first preset position, and when the pressing piece 13 presses down the pre-bent main cover 1012, the second inclined surface 133 of the pressing piece 13 cooperates with the first inclined surface 111 of the first base plate 11 to bend the pre-bent main cover 1012 again, so that the pre-bent main cover 1012 is pressed between the first inclined surface 111 and the second inclined surface 133 to form the insertion tongue 1016. In practical application, the inclination angles of the first inclined surface 111 and the second inclined surface 133 are set according to the desired bending degree of the main cover 1012.

As a preferred embodiment, as shown in FIG. 5, a plurality of the first protrusions 122 are provided on the second base plate 12 at intervals, first grooves 123 are formed between the adjacent first protrusions 122, and the accommodating portions 131 are provided corresponding to the plurality of first protrusion 122, so that a plurality of second protrusions 132 matched with the first grooves 123 are formed on the pressing piece 13, and the second protrusions 132 mutually engage with the first grooves 123. When the main cover 1012 is pressed, the first grooves 123 and the second protrusions 132 cooperate with each other such that the pressing piece 13 and the second base plate 12 do not interfere with each other within a limited range and the moving range of the pressing piece 13 is precisely limited.

As a preferred embodiment, as shown in FIG. 6, the pressing piece 13 further comprises slotted holes 135, and the slotted holes 135 are provided at one side of the accommodating portions 131 away from the first inclined surface 111. The slotted holes 135 communicate with the accommodating portions 131, and the slotted holes 135 can be regarded as upward extension of the accommodating portions 131 accordingly, so that the thicknesses of the first protrusions 122 can be set as occasion demands, regardless of a manufacturing process or the like. The first protrusions 122 with the normal thicknesses may be such that when the first base plate 11 and the second base plate 12 clamp and the pressing piece 13 presses the main cover 1012 onto the first inclined surface 111, the upper portions of the first protrusion 122 may be in the slotted holes 135 so as the movement and pressing of the pressing piece 12 are prevented from being affected.

As a preferred embodiment, as shown in FIG. 6, the pressing piece 13 further comprises connecting surfaces 134 provided between the second inclined surface 133 and the second protrusions 132, and the connecting surfaces 134 are parallel to the second inclined surface 133. While in use, the second protrusions 132 engage with the first grooves 123, at this time the connecting surfaces 134 can guide effectively to prevent misalignment of the first inclined surface 111 and the second inclined surface 133 caused by installation or other deviation.

As a preferred embodiment, as shown in FIG. 2, the second base plate 12 is further provided with a third protrusion 124, and the third protrusion 124 is provided at a lower part of the second base plate 11. The third protrusion 124 protrudes from the second clamping surface 121; when the first base plate 11 and the second base plate 12 clamp, the third protrusion 124 is located on one side of the first base plate 11 away from the pressing piece 13; a surface of the third protrusion 124 is a smooth curved surface formed by multiple arc surfaces; and when the first base plate 11 and the second base plate 12 clamp, the third protrusion 124 further plays the role of guiding and limiting, ensuring successful clamping of the first base plate 11 and the second base plate 12. When the pressing piece 13 presses down, the first base plate 11 and the second base plate 12 do not move relative to each other.

As a preferred embodiment, as shown in FIGS. 2 to 4, the first base plate 11 further comprises arc-shaped first guide surfaces 113 protruding towards the second base plate 12, and the second base plate 12 further comprises arc-shaped second guide surfaces 125 protruding towards the first base plate 11, and the first guide surfaces 113 are opposite to the second guide surfaces 125. The first guide surfaces 114 are located at the ends of the first base plate 11, the second guide surfaces 125 are opposite to the first guide surfaces 113 and are also located at the ends of the second base plate 12, the main cover 1012 enters between the first base plate 11 and the second base plate 12 from the corresponding ends of the first base plate 11 and the second base plate 12, and the first guide surface 113 and the second guide surface 125 form a large horn-shaped opening with the spacing decreased, so that the main cover 1012 of the packing box can be guided to enter between the first base plate 11 and the second base plate 12, and a situation that the main cover cannot enter between the first base plate 11 and the second base plate 12 due to the deviation of the main cover during the movement of the packing box 101 is prevented.

As shown in FIGS. 2-4, the tongue folding assembly 1 provided in this embodiment further comprises: a first driving member 14 connected with the first base plate 11 and the second base plate 12 to drive clamping of the first base plate 11 and the second base plate 12, and a second driving member 15 connected with the pressing piece 13 to drive pressing of the pressing piece 13. The main cover 1012 of the packing box enter between the first base plate 11 and the second base plate 12 via the guiding by the first guide surface 113 and the second guide surface 125, and the first driving member 14 drives the first base plate 11 and the second base plate 12 to clamp so that the main cover 1012 is clamped between the first clamping surface 112 and the second clamping surface 121, at the same time, the first protrusion 122 on the second base plate 11 bends the main cover 1012 in contact therewith towards the first base plate 11 to the first preset position, and the second driving member 15 drives the pressing piece 13 to press the main cover 1012 downwards, so that the main cover 1012 is bent again between the first inclined surface 111 and the second inclined surface 133 to form the insertion tongue 1016.

The tongue folding assembly provided in the first embodiment of the present application is simple in structure and easy to mount, and, when being used for product packing, can be used in combination with an device used in working processes such as box blank unfolding, packing box grabbing and material grabbing, and can also be used in combination with assemblies used in other packing processes of main covers or side covers.

With reference to FIG. 7-13, a second embodiment of the present application also provides a box sealing device 2 for bending main covers 1012 of a packing box to form insertion tongues 1016, comprising the tongue folding assembly 1 as previously described.

As a preferred embodiment, as shown in FIGS. 7-9, 11 and 12, the box sealing device 2 comprises the tongue folding assembly 1 as described above and further comprises a tongue inserting assembly 21 for inserting the insertion tongues 1016 into the packing box.

Specifically, the tongue inserting assembly 21 comprises a knocking piece 211, a fourth protrusion 2111 protruding from the knocking piece 211 to limit displacement of the insertion tongue 1016, and a third driving member 212 connected with the knocking piece 211, the third driving member 212 is capable of driving the knocking piece 211 to rotate to a preset position. The knocking piece 211 in the preset position in this embodiment is parallel to the top surface of the packing box 101 (the plane where the box opening 1015 is located). The knocking piece 211 is composed of a plurality of long rods, and in the present embodiment, is composed of three long rods connected perpendicularly to each other; when the knocking piece 211 is in the preset position, each long rod of the knocking piece 211 just abuts against the surface of the main cover 1012, that is, the knocking piece 211 needs to be matched with the main cover; and at the same time, the weight of the tongue inserting assembly 21 can be ensured to be relatively light, and the requirements for the mounting strength can be reduced. The fourth protrusion 2111 is provided at one end of the knocking piece 211 and protrudes in a direction close to the packing box 101, and the length of the fourth protrusion 2111 is set according to the length of the insertion tongue 1016 bent by the tongue folding assembly 1. After the insertion tongue 1016 is formed through bending by the tongue folding assembly 1, the first base plate 11, the second base plate 12 and the pressing piece 13 all return to original positions, and when the insertion tongue 1016 is out of the limitation of the pressing piece 13, the first base plate 11 and the second base plate 12, the insertion tongue 1016 tends to recover the original flat state, and at this time, the insertion tongue 1016 recovers in the opposite direction to the bending direction so that the bending angle becomes smaller, and here, the fourth protrusion 2111 serves to restrict the recovery of the insertion tongue 1016, that is, to restrict the unbending of the insertion tongue 1016. The number of the fourth protrusions 2111 may be plural, and the respective fourth protrusions 2111 may be spaced apart from each other, or may be one fourth protrusion 2111 located opposite to the middle of the insertion tongue 1016, and may be selected according to the requirements of the insertion tongue 1016. By inserting the insertion tongue 1016 into the packing box 101 in the manner described above, it is ensured that the insertion tongue 1016 is prevented from being inserted outside of the packing box 101 when the knocking piece 211 intend to insert the insertion tongue 1016 into the packing box 101. The third driving member 212 is preferably a rotating cylinder, which is inexpensive and easy to control.

More specifically, as shown in FIG. 8, the box sealing device 2 further comprises a limiting assembly 22 provided on one side of the first base plate 11 of the tongue folding assembly away from the pressing piece 211, wherein the limiting assembly 22 comprises a limiting piece 221, and a fourth driving member 222 connected with the limiting piece 221 to drive the limiting piece 221 to move in a direction away from or close to the tongue inserting assembly 21. When performing tongue inserting operation, there may be a small amount of deformation after the packing box is loaded, and at this time, the insertion tongue 1016 may not be effectively aligned, the fourth driving member 222 moves the limiting piece 221 to abut against the main plate 1012 of the packing box and applies a certain pressure or displacement thereto, so as to effectively ensure the overall flatness of the packing box when the insertion tongue is inserted, thereby ensuring the effectiveness of the inserting the insertion tongue.

It should be further noted that, as shown in FIGS. 7-9, the box sealing device 2 further comprises a fifth driving member 23 connected with the tongue folding assembly 1 for driving the tongue folding assembly 1 away from and close to the packing box. After tongue folding operation is completed by the tongue folding assembly 1, the fifth driving member 23 can drive the tongue folding assembly 1 to ascend or descend, thereby preventing the tongue folding assembly 1 from interfering with the operation of the tongue inserting assembly; and at the same time, with the arrangement of the fifth driving member 23, the tongue folding operation of packing boxes having different heights can be adapted.

It should be further noted that, as shown in FIGS. 11 and 12, the box sealing device 2 further comprises a sixth driving member 24 which can drive the tongue folding assembly 1, the tongue inserting assembly 21, the limiting assembly 22 and the fifth driving member 23 to move synchronously, so as to adapt to the needs of different heights of packing boxes or the needs of mounting.

It should be further noted that, as shown in FIG. 7, the box sealing device 2 further comprises a seventh driving member 25 connected with the tongue inserting assembly 21, and the seventh driving member 25 is capable of driving the tongue inserting assembly 21 to ascend or descend to cooperate with the fifth driving member 23, so that the tongue folding assembly 1 and the tongue inserting assembly 21 can both be adjusted according to the heights of packing boxes to adapt to different specifications of packing boxes.

As a preferred embodiment, as shown in FIGS. 9 and 10, the box sealing device 2 comprises the tongue folding assembly 1 and the tongue inserting assembly 21 as described above, as well as a cover folding assembly 26. The box sealing device 2 of this embodiment may be used for sealing the packing box as shown in FIG. 1, but is not limited thereto, and can complete: the bending and inserting of the side covers, the bending of the main covers to form the insertion tongues 1016 and the inserting of the insertion tongues 1016. Specifically, the cover folding assembly 26 comprises a mounting bracket 261, rotating rods 262 hinged to both sides of the mounting bracket 261 and is capable of rotating close to the packing box 101, and an eighth driving member 263 connected with the rotating rods 262, the eighth driving member 263 is capable of driving the two rotating rods 262 be close to or away from each other. The rotating rods 262 are located on the two sides of the mounting bracket 261 and are rotatably connected with the mounting bracket 261. In order to limit the spacing between the rotating rods, the cover folding assembly 26 further comprises protruding pieces 264 provided on the rotating rods 262 to limit the minimum distance between the two rotating rods 262, so that a situation that force cannot be effectively applied to the two side covers 1011 since the distance is too small and contact positions of the rotating rods 262 and the side covers 1011 are too close to the edges of the side covers 1011. Specifically, the protruding pieces 264 protrude between the two rotating rods 262 so that the spacing between the two rotating rods 262 can be limited.

When the box sealing device provided in the second embodiment of the present application is applied to material packing as a part of a packing machine, it usually needs to be mounted on the packing machine. Thus, as shown in FIGS. 7-9, 11 and 12, the box sealing device 2 further comprises a main frame 27 on which the fifth driving member 23, the sixth driving member 24 and the seventh driving member 25 are mounted.

A third embodiment of the present application also provides a packing machine comprising the above-mentioned box sealing device. With the arrangement of a first base plate and a second base plate, a main cover is initially bent to a first preset position, then the main cover is pressed onto a first inclined surface via a pressing piece to form a insertion tongue 1016, and the insertion tongue 1016 formed by bending is inserted into the packing box via a tongue inserting assembly, so as to complete the packing of the packing box having the main cover with the insertion tongue 1016.

With reference to the figures, a fourth embodiment of the present application also provides a computer readable medium connected with the tongue folding assembly 1 as described above, having stored therein preset program that, when executed, causes to carry out the following steps: clamping, by a first base plate 11 and a second base plate 12, to bend a main cover 1012 to a first preset position in a direction close to a first inclined surface 111, and pressing, by a pressing piece 13, the main cover 1012 onto a first inclined surface 111 to forma insertion tongue 1016.

According to the computer readable medium described in the present application, the first base plate 11 and the second base plate 12 are controlled to clamp to initially bend the main cover 1012, and then the main cover 1012 is pressed onto the first inclined surface 111 via the pressing piece 13 to form the insertion tongue 1016 in two steps, so that the bending degree of the insertion tongue 1016 is more controllable, and through the two-step forming, the damage to the main cover 1012 during one-step bending is effectively avoided, while the insertion tongue 1016 is prevented from being too large or too small due to an incorrect bending position in one-step bending.

The computer readable medium as described in the present application, connectable to the box sealing device 2 as described above, having stored therein preset program that, when executed, further causes to carry out the following steps:

S1, driving, by a fifth driving member 23, a tongue folding assembly 1 to move to a preset position;

S2, driving, by a first driving member 14, a first base plate 11 and a second base plate 12 to clamp to bend a main cover 1012 to a first preset position;

S3, driving, by a second driving member 15, a pressing piece 13 to press the main cover 1012 onto a first inclined surface 111;

S4, driving, by the second driving member 15, the pressing piece 13 to return, and driving, by the first driving member 14, the first base plate 11 and the second base plate 12 to return;

S5, driving, by the fifth driving member 23, the tongue folding assembly 1 to return;

S6, driving, by a sixth driving member 24, a tongue inserting assembly 21 to a preset position;

S7, driving, by a third driving member 212, a knocking piece 211 to insert the insertion tongue 1016 into a packing box 101;

S8, driving, by the third driving member 212, the knocking piece 211 to its position, and driving, by the sixth driving member 24, the tongue inserting assembly 21 to return.

It should be noted that steps S1, S5, S6 and S8 may or may not be provided as required, and steps S1, S5, S6 and S8 are not required in the present embodiment since driving by the fifth driving member 23 the tongue folding assembly 1 moves to the position corresponding to the packing box 101 and will not move any more, and that the above steps can be provided if the packing box 101 is too high, resulting in the need for the tongue folding assembly 1 and the tongue inserting assembly 21 to individually complete respective operations and then leave away their working positions.

A sixth embodiment of the present application provides a method for bending and inserting insertion tongues 1016 of a packing box, comprising the following steps:

driving, by a fifth driving member 23, a tongue folding assembly 1 to move to a preset position;

driving, by a first driving member 14, a first base plate 11 and a second base plate 12 to clamp to bend a main cover 1012 to a first preset position;

driving, by a second driving member 15, a pressing piece 13 to press the main cover 1012 onto a first inclined surface 111;

driving, by the second driving member 15, the pressing piece 13 to return, and driving, by the first driving member 14, the first base plate 11 and the second base plate 12 to return;

driving, by the fifth driving member 23, the tongue folding assembly 1 to return;

s driving, by a sixth driving member 24, a tongue inserting assembly 21 to another preset position;

driving, by a third driving member 212, a knocking piece 211 to insert the insertion tongue 1016 into a packing box 101; and

driving, by the third driving member 212, the knocking piece 211 to return, and driving, by the sixth driving member 24, the tongue inserting assembly 21 to return.

Preferably, the method of bending and inserting the insertion tongues 1016 of the packing box comprises the following steps:

driving, by a fifth driving member 23, a tongue folding assembly 1 to move to a preset position;

driving, by a first driving member 14, a first base plate 11 and a second base plate 12 to clamp to bend a main cover 1012 to a first preset position;

driving, by a second driving member 15, a pressing piece 13 to press the main cover 1012 onto a first inclined surface 111;

driving, by the second driving member 15, the pressing piece 13 to return, and driving, by the first driving member 14, the first base plate 11 and the second base plate 12 to return;

driving, by the fifth driving member 23, the tongue folding assembly 1 to return;

driving, by a sixth driving member 24, the tongue inserting assembly 21 and a limiting assembly 22 to another preset positions;

driving, by a fourth driving member 222, a limiting piece 221 to abut against main plates 1014 of the packing box and to apply certain pushing force to the main plates 1014;

driving, by a third driving member 212, a knocking piece 211 to insert the insertion tongue 1016 into a packing box 101; and

driving, by the third driving member 212, the knocking piece 211 to return, and driving, by the sixth driving member 24, the tongue inserting assembly 21 to return. 

1. A tongue folding assembly, used for bending main covers of a packing box to form insertion tongues, comprising a first base plate having a first inclined surface, a second base plate capable of bending the main cover towards the first inclined surface to a first preset position, and a pressing piece capable of pressing the main cover onto the first inclined surface.
 2. The tongue folding assembly of claim 1, wherein the first base plate further comprises a first clamping surface, and the second base plate comprises a second clamping surface provided corresponding to the first clamping surface, and at least one first protrusion protruding towards the first base plate, to bend the main cover to the first preset position.
 3. The tongue folding assembly of claim 2, wherein the pressing piece comprises an accommodating portion provided corresponding to the first protrusion, to engage with the first protrusion.
 4. The tongue folding assembly of claim 3, wherein the first protrusion comprises a first end surface adjacent to the first base plate, and the accommodating portion comprises a first matching surface provided corresponding to the first end surface.
 5. The tongue folding assembly of claim 1, wherein the first inclined surface is provided on one side of the first base plate away from the second base plate, and the pressing piece comprises a second inclined surface provided corresponding to the first inclined surface.
 6. The tongue folding assembly of claim 1, wherein the first base plate further comprises arc-shaped first guide surfaces protruding towards the second base plate, and the second base plate further comprises arc-shaped second guide surfaces protruding towards the first base plate.
 7. The tongue folding assembly of claim 1, wherein the second base plate is further provided with a third protrusion and the third protrusion is provided at a lower part of the second base plate.
 8. A box sealing device comprising the tongue folding assembly of claim 2, further comprises a tongue inserting assembly for inserting insertion tongues into the packing box.
 9. A box sealing device comprising the tongue folding assembly of claim 3, further comprises a tongue inserting assembly for inserting insertion tongues into the packing box.
 10. A box sealing device comprising the tongue folding assembly of claim 4, further comprises a tongue inserting assembly for inserting insertion tongues into the packing box.
 11. The box sealing device of claim 8, wherein the tongue inserting assembly comprises a knocking piece, a fourth protrusion protruding from the knocking piece to limit displacement of the insertion tongue, and a third driving member for driving the knocking piece to rotate.
 12. The box sealing device of claim 11, comprising a limiting assembly provided on one side of the first base plate of the tongue folding assembly away from the pressing piece, the limiting assembly comprises a limiting piece, and a fourth driving member connected with the limiting piece to drive the limiting piece to move in a direction away from or close to the tongue inserting assembly.
 13. The box sealing device of claim 11, comprising a fifth driving member connected with the tongue folding assembly for driving the tongue folding assembly away from and close to the packing box.
 14. A packing machine comprising the box sealing device of claim
 8. 15. A packing machine comprising the box sealing device of claim
 11. 16. A packing machine comprising the box sealing device of claim
 12. 17. A computer readable medium, capable of connecting with the tongue folding assembly of claim 2, having stored therein preset program that, when executed, causes to carry out the following steps: clamping, by a first base plate and a second base plate, to bend a main cover to a first preset position in a direction close to a first inclined surface, and pressing, by a pressing piece, the main cover onto a first inclined surface to form a insertion tongue.
 18. A method for bending and inserting insertion tongues of a packing box, comprising the following steps: driving, by a fifth driving member, a tongue folding assembly to move to a preset position; driving, by a first driving member, a first base plate and a second base plate to clamp to bend a main cover to a first preset position; driving, by a second driving member, a pressing piece to press the main cover onto a first inclined surface; driving, by the second driving member, the pressing piece to return, and driving, by the first driving member, the first base plate and the second base plate to return; driving, by the fifth driving member, the tongue folding assembly to return; driving, by a sixth driving member, a tongue inserting assembly to another preset position; driving, by a third driving member, a knocking piece to insert the insertion tongue into a packing box; and driving, by the third driving member, the knocking piece to return, and driving, by the sixth driving member, the tongue inserting assembly to return. 